Distribution of nano-phytoplankton including fragile flagellates in the subtropical northwestern Philippine Sea |
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| Authors: | Takashi Tsuji Rokuro Adachi |
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| Institution: | (1) Ocean Research Institute, University of Tokyo, Nakano, 164 Tokyo, Japan;(2) Present address: Mitsubishi-Kasei Institute of Life Sciences, Minamiooya 11, Machida-shi, 194 Tokyo, Japan;(3) Faculty of Fisheries, Mie University, Edobashi, 514 Tsu, Japan |
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| Abstract: | Distribution of nano-phytoplankton was studied during May–June 1971 in the subtropical northwestern Philippine Sea. Plankton samples were collected at various depths between 0 and 200 m. A gentle gravity filtration technique was employed to concentrate the samples. They were then examined without fixation under a microscope. The average cell number of total nano-phytoplankton was 1×104 2×104/l, and nano-flagellate cell number often accounted for more than 90% of the total cell number of nano-phytoplankton, consisting mainly ofGymnodinium lacustre, Amphidinium sp., and unidentified small nano-flagellates. The distribution of nano-phytoplankton did not correlate with vertical profiles of chlorophylla. |
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